AN INVESTIGATION IS UNDERWAY INTO WHAT CAUSED A FIRE THAT BURNED A STRUCTURE AND TWO VEHICLES EARLY THIS MORNING IN MURPHY. RURAL METRO FIRE RESPONDED TO THE 3500 BLOCK OF SOUTHSIDE ROAD. CREWS WERE ABLE TO KNOCK DOWN THE FLAMES, WHICH HAD SPREAD TO NEARBY GRASS AND BRUSH AROUND 3 THIS MORNING. FIRE INVESTIGATORS BELIEVE SUSPICIOUS ACTIVITY WAS INVOLVED IN CAUSING THE BLAZE.